A Wire of Length L Carries a Current I, Going

question 2

Multiple Choice

A wire of length L carries a current I, going from west to east, in the presence of a magnetic field B that is pointing vertically up. The wire moves a distance d to the south. The work done by the magnetic force on the moving charges is

• A) "+ILlBd."
• B) "-ILBd."
• C) "+IL²B/d."
• D) "-IL²B/d."
• E) "zero."

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Definitions:

Total Resistance

The combined resistance of all resistors in a circuit, which determines the amount of current flowing through the circuit.

Wattless Power

See reactive power.

RL Circuit

An electrical circuit consisting of resistors (R) and inductors (L) used to filter signals or store energy.

Power Values

Quantitative measurements that represent the rate at which energy is used, produced, or transferred within a system.